2 dead, 4 in hospital after partial building collapse at London, Ont., construction site

Two people have died and four others remain in hospitalafter a building partially collapsed Friday in London, Ont.

Doctors at the London Health Sciences Centresaid one individual diedseveral hours after the collapse, having arrived at the hospital without vital signs.

Another person was trapped in the ensuing collapse, but police said late Friday evening that the person has died.

Of the injured,one is in critical condition, another is in serious condition and two others are in fair condition.

A statement from the City of London says the collapse happened at 555 Teeple Terracein the city's west end just before noon when the wall of a four-storey building under construction suddenly gave way.

London Fire Department deputy chief Matt Hepditch also said it's not yet known what might have caused the collapse.

Local resident Elizabeth Rutherford saidshe heard a "horrendous crash" shortly after arriving home.

"I could hear all this yelling," she said. "I kept hearing them and thought there's something serious going on. I opened one of the curtains and all hell was breaking loose out here."

Rutherford said she saw construction workers rushing around and shortly after, emergency crews began to arrive.

Police are asking people to avoid the area. The roads leading to the site have been blocked to traffic.

The city has activated its emergency operations centre and, shortly after 1 p.m., Toronto Fire Services chiefMatthew Peggtweeted that a heavy urban search-and-rescueteam has been authorized to be sent to London.

In announcing the second death, police said late Friday that rescue efforts have shifted to recovery operations.

London's Victoria Hospital hadalso issued a code orange following the collapse, which is used in the event of an external disaster that creates animmediate demand for services that outstrip the hospital's resources.

The hospital said doctors were also onsite to help with the rescue.